#pragma once
#include "gp_Pnt2d.h"
#include "gp_Dir2d.h"

class gp_Pnt2d;
class gp_Dir2d;
class gp_Trsf2d;
class gp_Vec2d;

//! Describes an axis in the plane (2D space). <br>
//! An axis is defined by: <br>
//! -   its origin (also referred to as its "Location point"),   and <br>
//! -   its unit vector (referred to as its "Direction"). <br>
//! An axis implicitly defines a direct, right-handed <br>
//! coordinate system in 2D space by: <br>
//! -   its origin, <br>
//! - its "Direction" (giving the "X Direction" of the coordinate system), and <br>
//! -   the unit vector normal to "Direction" (positive angle <br>
//!   measured in the trigonometric sense). <br>
//! An axis is used: <br>
//! -   to describe 2D geometric entities (for example, the <br>
//!   axis which defines angular coordinates on a circle). <br>
//!   It serves for the same purpose as the STEP function <br>
//!   "axis placement one axis", or <br>
//! -   to define geometric transformations (axis of <br>
//!   symmetry, axis of rotation, and so on). <br>
//! Note: to define a left-handed 2D coordinate system, use gp_Ax22d. <br>
class gp_Ax2d  {

public:

  

  //! Creates an axis object representing X axis of <br>
//!            the reference co-ordinate system. <br>
      gp_Ax2d();
  
//!  Creates an Ax2d. <P> is the "Location" point of <br>
//!  the axis placement and V is the "Direction" of <br>
//!  the axis placement. <br>
      gp_Ax2d(const gp_Pnt2d& P,const gp_Dir2d& V);
  //!  Changes the "Location" point (origin) of <me>. <br>
        void SetLocation(const gp_Pnt2d& Locat) ;
  //! Changes the direction of <me>. <br>
        void SetDirection(const gp_Dir2d& V) ;
  //! Returns the origin of <me>. <br>
       const gp_Pnt2d& Location() const;
  //! Returns the direction of <me>. <br>
       const gp_Dir2d& Direction() const;
  
//!  Returns True if  : <br>
//!  . the angle between <me> and <Other> is lower or equal <br>
//!    to <AngularTolerance> and <br>
//!  . the distance between <me>.Location() and <Other> is lower <br>
//!    or equal to <LinearTolerance> and <br>
//!  . the distance between <Other>.Location() and <me> is lower <br>
//!    or equal to LinearTolerance. <br>
       bool IsCoaxial(const gp_Ax2d& Other,const double AngularTolerance,const double LinearTolerance) const;
  //! Returns true if this axis and the axis Other are normal to <br>
//! each other. That is, if the angle between the two axes is equal to Pi/2 or -Pi/2. <br>
//! Note: the tolerance criterion is given by AngularTolerance. <br>
        bool IsNormal(const gp_Ax2d& Other,const double AngularTolerance) const;
  //! Returns true if this axis and the axis Other are parallel, <br>
//! and have opposite orientations. That is, if the angle <br>
//! between the two axes is equal to Pi or -Pi. <br>
//! Note: the tolerance criterion is given by AngularTolerance. <br>
        bool IsOpposite(const gp_Ax2d& Other,const double AngularTolerance) const;
  //!  Returns true if this axis and the axis Other are parallel, <br>
//! and have either the same or opposite orientations. That <br>
//! is, if the angle between the two axes is equal to 0, Pi or -Pi. <br>
//! Note: the tolerance criterion is given by AngularTolerance. <br>
        bool IsParallel(const gp_Ax2d& Other,const double AngularTolerance) const;
  
//! Computes the angle, in radians, between this axis and <br>
//! the axis Other. The value of the angle is between -Pi and Pi. <br>
        double Angle(const gp_Ax2d& Other) const;
  //! Reverses the direction of <me> and assigns the result to this axis. <br>
        void Reverse() ;
  
//!  Computes a new axis placement with a direction opposite to <br>
//!  the direction of <me>. <br>
        gp_Ax2d Reversed() const;
  
       void Mirror(const gp_Pnt2d& P) ;
  
//!  Performs the symmetrical transformation of an axis <br>
//!  placement with respect to the point P which is the <br>
//!  center of the symmetry. <br>
       gp_Ax2d Mirrored(const gp_Pnt2d& P) const;
  
       void Mirror(const gp_Ax2d& A) ;
  
//!  Performs the symmetrical transformation of an axis <br>
//!  placement with respect to an axis placement which <br>
//!  is the axis of the symmetry. <br>
       gp_Ax2d Mirrored(const gp_Ax2d& A) const;
  
        void Rotate(const gp_Pnt2d& P,const double Ang) ;
  
//!  Rotates an axis placement. <P> is the center of the <br>
//!  rotation . Ang is the angular value of the rotation <br>
//!  in radians. <br>
        gp_Ax2d Rotated(const gp_Pnt2d& P,const double Ang) const;
  
       void Scale(const gp_Pnt2d& P,const double S) ;
  
//!  Applies a scaling transformation on the axis placement. <br>
//!  The "Location" point of the axisplacement is modified. <br>
//!  The "Direction" is reversed if the scale is negative. <br>
        gp_Ax2d Scaled(const gp_Pnt2d& P,const double S) const;
  
        void Transform(const gp_Trsf2d& T) ;
  //!  Transforms an axis placement with a Trsf. <br>
        gp_Ax2d Transformed(const gp_Trsf2d& T) const;
  
        void Translate(const gp_Vec2d& V) ;
  
//!  Translates an axis placement in the direction of the vector <br>
//!  <V>. The magnitude of the translation is the vector's magnitude. <br>
        gp_Ax2d Translated(const gp_Vec2d& V) const;
  
        void Translate(const gp_Pnt2d& P1,const gp_Pnt2d& P2) ;
  
//!  Translates an axis placement from the point <P1> to the <br>
//!  point <P2>. <br>
        gp_Ax2d Translated(const gp_Pnt2d& P1,const gp_Pnt2d& P2) const;
    const gp_Pnt2d& _CSFDB_Getgp_Ax2dloc() const { return loc; }
    const gp_Dir2d& _CSFDB_Getgp_Ax2dvdir() const { return vdir; }

private: 
	gp_Pnt2d loc;
	gp_Dir2d vdir;


};